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audioconvert: add resample.prefill option

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Add a resampler option to prefill the resampler with 0. This then
results in the resampler always outputing and consuming the same
amount of data instead of a short buffer in the beginning.
This commit is contained in:
Wim Taymans 2022-09-19 12:35:49 +02:00
parent d48627d0e7
commit 31f9e18edb
3 changed files with 8 additions and 1 deletions
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2
spa/plugins/audioconvert/audioconvert.c
View file

@ -2844,6 +2844,8 @@ impl_init(const struct spa_handle_factory *factory,
spa_atou32(s, &this->quantum_limit, 0);
else if (spa_streq(k, "resample.peaks"))
this->peaks = spa_atob(s);
else if (spa_streq(k, "resample.prefill"))
this->resample.options |= RESAMPLE_OPTION_PREFILL;
else if (spa_streq(k, "factory.mode")) {
if (spa_streq(s, "merge"))
this->direction = SPA_DIRECTION_OUTPUT;

5
spa/plugins/audioconvert/resample-native.c
View file

@ -304,7 +304,10 @@ static void impl_native_reset (struct resample *r)
if (d == NULL)
return;
memset(d->hist_mem, 0, r->channels * sizeof(float) * d->n_taps * 2);
d->hist = (d->n_taps / 2) - 1;
if (r->options & RESAMPLE_OPTION_PREFILL)
d->hist = d->n_taps - 1;
else
d->hist = (d->n_taps / 2) - 1;
d->phase = 0;
}

2
spa/plugins/audioconvert/resample.h
View file

@ -32,6 +32,8 @@
struct resample {
struct spa_log *log;
#define RESAMPLE_OPTION_PREFILL (1<<0)
uint32_t options;
uint32_t cpu_flags;
const char *func_name;